Ethical decisions related to computer technology and computer use are subject to three primary influences: (1) the individual's own personal code (2) any informal code of ethical behavior that exists in the work place, and (3) exposure to formal codes of ethics. The relative importance of these codes, as well as factors influencing these codes, was explored in a nationwide survey of information system (IS) professionals. The implications of the findings are important to educators and employers in the development of acceptable ethical standards.